Diestock



K. ANDERSSON. DIESTOCK.

APPLlcATloN man senza. 191s.

1,331,973. Patented Feb.f24,1920.

2 SHEETS-SHEET l.

Kami @Natali Anfvssn K. G; ANDRSSON.

DIESTOCK. APPLICATION FILED SEPI. 2a, 191s.

Patented Feb. 24, 1920.

I 2 SHEETS-SHEET 2.

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y UNITED sTATEs PATENT-OFFICE. I'

KARL GUSTAE ANDEESSON, oEsKoGsEoRs, REETELED, SWEDEN, AssIGNon. oEoNE- Turm) To JOHAN AUGUST PETERSON, oF EEETELED, SWEDEN.

nIEsTocK.

applicati@ med september 2s, '1918. serial No. 256,110.

To all 'whom t may concern.' f

Beit known that I, KARL GUsTAF ANDERS- SoN, a subject of the King of Sweden, residing at Slcogsfors, Refteled, in the Kingdom of Sweden, have invented a new and useful Improvement in Diestocks, of whlch the following is a specification.

The lpresent invention relates to a d1estock of the type in which the dies may be moved into and out of engagement with the work byV means of a rotatable ring or sleeve connected with the dies, which ring 'or sleeve may be turned by means of a mechanism attached to one or both of the handles of the die-stock. f

The inventioni's broadly'characterized by this that the said mechanism is 'located within" one or vboth of the tubular-handles by means of'which the 'die-stock is turned, and

is so connected with the ring that 'the ring may be turned in one and the other. direction by means of the said mechamsm so that the dies may be moved into as well as out of engagement with the work. By `this.

arrangement the mechanism is very effectively protected against being damaged or spoiled,.and the essential advantage is also attained that the tool may be made devoid of springs, in contradistinction to die-stocks of this type as heretofore known, in which the. ring or the `sleeve has been'connected with one or several springs for being turned in the direction corresponding to the movement of the dies out of engagement with the work. v v

A further important feature of the invention consists in the rotatable ring or sleeve being divided into twoV concentrically 'arranged members rotatable and radjustable relatively to one another, one member being connected with the handle mechanism and the other member being connected with the dies. By rotating and adjusting the latter member. relatively to the first mentioned member the mutual position of the dies in working position and inopen position may be changed, consequently, when the dies have,

become worn and resharpened they may be readjusted to compensate for-their decreased dimensions so a'svto'suit the desired diameterV of the screw,` by adjustment of the member or partof the 'ring connected. with the dies. Y

The invention also comprises improvedV ineens vfer connecting the dies with the ,said

*i Specification of Letters Patent. i

Vtom of said member 6.

Patented Feb. 24, 11,920;

member or part of the ring, as well as special means for rotating and locking the ring or the sleeve, which means will be further described here below with reference to the accompanying drawings, which illustrate an embodiment of the invention. V

In the drawings Figure l shows a plan viewfof the vdie-stock with the cover removed and with the diesin workin position. Fig. 2shows a side view of t e diestock, one of the handles and part of the mechanism being shown in section. Fig. 3 shows a view similar toFig. l, of the diestock with the dies in openl position. Fig. 4 shows a plan View of the member or part of the rotatable ring or sleeve connected with and actuating the dies. Fig. 5 shows a. plan view of themember or'part ofthe ringor Vsleeve connected with theV handle mechanism. Fig. 6 shows a side view partly in'section of one of the dies and the means forV connecting the dies with the ring, 'i as well as the means for locking the vtwo memconsists'of 'an upper part or member 5,r Fig. '4, and a lower part or member 6, Fig. 5. yThe lower member 6 is turned downfat 7 to form la bearing surface fory a fiange 8 on the upper member 5. The lower member 6 is cut open at 9, where it is provided with a conical and threaded hole 10 in which a. conical screw 11 is screwed from theibot- By screwing the screw 11 into the hole 10 the lower member 6 is widened so that the upper member 5 is securely clamped to theV same. When the screw `11 is screwed out of said hole 10 the member 6 'again contracts so that the member 5y mayv be rotated and adjusted on the member 6 for adjustment of the dies when worn and resharpened'.'

' The dies 12 which are placed and guided into radial grooves: in the hub 2, are 'connected with the upper member 5 by means of hooks 13, Fig. 6, which are introduced into openings in the 'dies 12 and engage ec- Y centrically arranged grooves 14 in the upper expensive to manufacture, it being only In the tubular handle 4 a piston 15 is mov-v able near the portion 3 of the die-stock frame, said piston being connected by means of the rod 16 with the lever 18 vwhich is pivoted on the stud 17. The piston 15 is vpro-Vv vided with ari-oblique surface 19 at its inner 1 end. Whenthe piston 15 is moved inward toward the center of the die-stock this oblique surface engages oneedge of a notch 20, Fig. 5, in the lower ring member 6. lThis member 6 is provided with another notch 21 engagedby a hook 22 on' a rod 23 provided at its other end with a head 24 movable in a slot 25 in the piston 15. These members operate in thefollowing manner:

. `When the lever 18' is turned out from the handley 4 the piston 15 occupies its retracted position shown in Fig. 3 and the dies 12 are in openposition. When the dies 12 are to be moved into working position the lever 18 is turned into the handle 4 thereby moving the piston 15 inward vby means of the rod 16. Owing to this movement of the piston 15 the rod 23 is also moved, said rod causing the .initial rotation of the two ring members 5 and 6. At the further movement of the piston 15 and of the ring members the oblique surface Y19 on the piston engages one edge of Y the notch 20 in the ring member 6,' and owing to this engagement the furtherinward movement ofthe piston 15 will effect vthe further rotation of the ring members 5 and 6, until the piston 15 arrives in theposition shown in Fig. 1 in which it projects into the notch 20 and locks the ring members andY 6 and the'dies 12 in the working position. The piston 15 arrives into thisposition by the turning of the lever 18 into alinement with the handle 4. When'the dies 12 are to be retracted the lever 18 is turned out from vthe handle 4 thereby retracting the piston 15. When the piston 15 is retracted so far that the oblique surface 19 releases lthe edge of the notch 20. the piston exerts a pull on the rod 23'which effects the further backward turning of the ring members 5 and 6 until the dies 12 arrive into idle positions.

v"It is obvious that variouschanges and modifications may be made in the detailed construction herein illustrated and described, and the right is therefore reserved to make such 'changes and modificationsl as fall within l.the scope ofthe' appended claims.

yIclaimz 1..In la die-stock, the combination of a frame, dies movable in said frame, a ring rotatable in said frameY 'and connected with said dies,a tubular handle secured to said frame, and means located within said handle for rotating said ring in both directions. ,A

2. In a die-stock, the combination -ofla frame, dies movable in said frame, a ring rotatable'in said frame and providedwith a notch, means connecting said.v dies to saidV ring, a tubular handlesecured'to said frame, a piston'movable in said handle and'pro-v vided withan oblique surface adapted to engage one edge of said slot in said ring, and means within said handle forfrotating said ring in both directions and for moving said piston toward and laway Jfrom said ring-:

3. In a diestock,the combination ,of aframe, dies movable in said frame, a ring rotatable in said frame and provided with a notch, means connectingsaid dies torsaid ring, a tubular handlesecured to said frame,

av piston movable in said handle and provided with an oblique surface adapted to engage one edge of said slot in said ring,

a rod pivotallyconnected at one, end to said ring and at its other end to said piston, and mean-s withinsaid handle for moving-said piston toward and away from lsaid ring.,

.4. In a die-stock, 4the combinationV of a frame, diesmovable insaidframe, a ring rotatable in said frame, said ring compris.- ing two members-rotatable andl adjustable relatively ,to one another, means connecting said dies, to one of saidrring members,.a. tubular handle secured toy said' frame, and

Vmeans wit-hin saidhandle for rotatingthe second ring member in both directions.

5. In a die-stock, the lcombination of a frame, dies movable in said frame, a ring y rotatable in said frame, said ring. comprising twojmembers rotatable andadjustable relatively to one another, one yof said ring members .beingprovided with eccentrical grooves and the second-ring `member being provided with a'notch, means for securing Y said Vring members to one another` in adjusted position,:means connecting said dies to the firstnamed ring member and'. coperating with said eccentrical grooves, atubular handle secured to said frame, a pistonmovable in said handle'and provided with an oblique surface adapted to engage one edge of said slot in said second ring member, a rod pivotally connecteduat'one enduto said secondl ringmember and at its other endto said piston, and meansfwithin'said handle lfor moving vsaid" Vpiston toward and away from said ring. f

` y6. Ina die-stock, thecombination of a frame, dies movablein said frame,a ring member rotatable in said frame vand provided with eccentrical grooves, means'con-` necting said. dies to vsaid ring member and coperating with said eccentricall grooves,-

a' substantially cylindrical fiange'on said ring member, a slotted secondfring member rotatable in said frame and provided with anotch, a substantially cylindrical vportion on said second ring member fitting into said cylindrical flange, means comprislng a conical screw threaded into a correspondingly threaded hole at the slot in said second ung member for extending said second ring member and for securingu said two ringmembers to one another in adjusted position, a tubular handle secured to said frame, a piston movable in said handle and provided with an oblique surface adapted to engage one edge of said slot in said second ring member, a rod pivotally connected at one end to said second ring member and at its other end to said piston, and means within said handle for moving said piston toward and away from said ring members.

7. In a die-stock, the combination of aframe, dies movable in said frame and provided with holes, a ring member rotatable in said frame and provided with eccentrical grooves, hooks introduced into said holes in said dies and into said eccentrical grooves in said ring member, a substantially cylindrical flange onsaid ring member, Va slotted second ring member rotatable in said frame and provided With a notch, a substantially cylindrical portion on said second ring member fitting into said cylindricalange, means comprising a conical screw threaded into a correspondingly threaded hole at the slot in said second ring member for extending said second ring member and for securing said two ring members to one another in adjusted position, a tubular handle secured to said frame, a piston movable in said handle and provided with an oblique surface adapted to engage one edge of said slot in said second ring member, a rod pivotally connected at one end to said second ring member and at its other end to said piston, and means Vwithin said handle for moving said piston toward and away from said ring members.

KARL GUSTAF ANDERSSON. 

